I've used so many of these certificates to save a lot of money. For instance, I was able to get a $25 off $50 certificate to a nearby deli for just $4! I ordered a ton of food for a fraction of the price. Such a great deal. Now, there's one place with the same $25 off $50 and they are terrible at redeeming the certificate--always making excuses--"dine-in only, can't be ordered online, etc." even though there are NO such limitations within the conditions. But you can always exchange those for other certificates using a PC (this option isn't available on mobile sites). Basically, you can find great deals and save money if the business owners honor their deals. There are always promotions through restaurant.com so always check. Usually you can get $10 certificates for just $2.